Costco Wholesale Corp /New (COST) insider trading.
In Q3 2026, insiders at Costco Wholesale Corp /New reported 17 non-derivative transactions on 12 Forms 3, 4 and 5: 0 open-market purchases and 2 sales worth $2.7M.
- Transactions
- 17
- Purchases (P)
- 0
- Sales (S)
- 2
- Net shares, P minus S
- -3,001
- Insiders
- 8
- Last filed
- 2026-09-30
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Adamo Claudine | Officer · Executive Vice President | 3 | 0 | 1 |
| Frates Caton | Officer · Sr. Executive Vice President | 3 | 0 | 1 |
| Jones Teresa A. | Officer · Executive Vice President | 2 | 0 | 0 |
| Klauer James C | Officer · Executive Vice President | 2 | 0 | 0 |
| Riel Pierre | Officer · Executive Vice President | 2 | 0 | 0 |
| Rubanenko Yoram | Officer · Executive Vice President | 2 | 0 | 0 |
| Wilcox William Richard | Officer · Executive Vice President | 2 | 0 | 0 |
| Raikes Jeffrey S | Director | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-29 | Adamo Claudine | S (D) | 2,200 | $915.93 | 7,134 | Form 4 |
| 2026-09-29 | Frates Caton | S (D) | 801 | $915.93 | 7,912 | Form 4 |
| 2026-09-10 | Adamo Claudine | A (A) | 4,129 | $0 | 10,250 | Form 4 |
| 2026-09-10 | Adamo Claudine | F (D) | 917 | $902.38 | 9,334 | Form 4 |
| 2026-09-10 | Frates Caton | A (A) | 4,552 | $0 | 10,367 | Form 4 |
| 2026-09-10 | Frates Caton | F (D) | 1,654 | $902.38 | 8,713 | Form 4 |
| 2026-09-10 | Jones Teresa A. | F (D) | 1,459 | $902.38 | 6,598 | Form 4 |
| 2026-09-10 | Jones Teresa A. | A (A) | 4,129 | $0 | 8,057 | Form 4 |
| 2026-09-10 | Klauer James C | A (A) | 4,129 | $0 | 48,966 | Form 4 |
| 2026-09-10 | Klauer James C | F (D) | 936 | $902.38 | 48,030 | Form 4 |
| 2026-09-10 | Riel Pierre | F (D) | 1,562 | $902.38 | 14,246 | Form 4 |
| 2026-09-10 | Riel Pierre | A (A) | 4,552 | $0 | 15,808 | Form 4 |
| 2026-09-10 | Rubanenko Yoram | F (D) | 1,696 | $902.38 | 10,680 | Form 4 |
| 2026-09-10 | Rubanenko Yoram | A (A) | 4,129 | $0 | 12,376 | Form 4 |
| 2026-09-10 | Wilcox William Richard | A (A) | 4,129 | $0 | 6,129 | Form 4 |
| 2026-09-10 | Wilcox William Richard | F (D) | 1,935 | $902.38 | 4,194 | Form 4 |
| 2026-07-10 | Raikes Jeffrey S | G (D) | 5,249 | $0 | 6,044 | Form 4 |
Transaction codes in this quarter
Get COST insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=909832&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · COST company page · Costco Wholesale Corp /New on SEC.gov
Questions
Are insiders buying or selling Costco Wholesale Corp /New (COST)?
In Q3 2026, insiders at Costco Wholesale Corp /New reported 17 non-derivative transactions on 12 Forms 3, 4 and 5: 0 open-market purchases and 2 sales worth $2.7M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these Costco Wholesale Corp /New insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/cost.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.